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首页> 外文期刊>Arthritis & Rheumatism >Protective targeting of high mobility group box chromosomal protein 1 in a spontaneous arthritis model
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Protective targeting of high mobility group box chromosomal protein 1 in a spontaneous arthritis model

机译:自发性关节炎模型中高迁移率族盒染色体蛋白1的保护性靶向

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ObjectiveHigh mobility group box chromosomal protein 1 (HMGB-1) is a DNA binding nuclear protein that can be released from dying cells and activated myeloid cells. Extracellularly, HMGB-1 promotes inflammation. Clinical and experimental studies demonstrate that HMGB-1 is a pathogenic factor in chronic arthritis. Mice with combined gene deficiency for DNase II and IFNRI spontaneously develop chronic, destructive polyarthritis with many features shared with rheumatoid arthritis. DNase II is needed for macrophage degradation of engulfed DNA. The aim of this study was to evaluate a potential pathogenic role of HMGB-1 in this novel murine model.MethodsThe course of arthritis, assessed by clinical scoring and histology, was studied in DNase II−/− × IFNRI−/− mice, in comparison with heterozygous and wild-type mice. Synovial HMGB-1 expression was analyzed by immunohistochemistry. Serum levels of HMGB-1 were determined by Western immunoblotting and enzyme-linked immunosorbent assay (ELISA), and anti–HMGB-1 autoantibodies were detected by ELISA. Macrophage activation was studied by immunostaining for intracellular interleukin-1β and HMGB-1. HMGB-1 was targeted with truncated HMGB-1–derived BoxA protein, acting as a competitive antagonist, with intraperitoneal injections every second day for 5 weeks.ResultsDNase II−/− × IFNRI−/− mice developed symmetric polyarthritis with strong aberrant cytosolic and extracellular HMGB-1 expression in synovial tissue, in contrast to that observed in control animals. Increased serum levels of HMGB-1 and HMGB-1 autoantibodies were recorded in DNase II−/− × IFNRI−/− mice, both prior to and during the establishment of disease. Systemic HMGB-1–specific blockade significantly ameliorated the clinical disease course, and a protective effect on joint destruction was demonstrated by histologic evaluation.ConclusionHMGB-1 is involved in the pathogenesis of this spontaneous polyarthritis, and intervention with an HMGB-1 antagonist can mediate beneficial effects.
机译:目的高迁移率族盒染色体蛋白1(HMGB-1)是一种DNA结合核蛋白,可以从垂死细胞和活化的髓样细胞中释放出来。在细胞外,HMGB-1促进炎症。临床和实验研究表明,HMGB-1是慢性关节炎的致病因素。具有DNase II和IFNRI联合基因缺陷的小鼠自发发展为慢性,破坏性多关节炎,具有与类风湿关节炎共有的许多特征。吞噬DNA的巨噬细胞降解需要DNase II。这项研究的目的是评估HMGB-1在这种新型鼠模型中的潜在致病作用。方法在DNase II -/-×中研究了通过临床评分和组织学评估的关节炎病程与杂合型和野生型小鼠相比,IFNRI -/-小鼠。通过免疫组化分析滑膜HMGB-1表达。通过Western免疫印迹和酶联免疫吸附测定(ELISA)测定血清HMGB-1水平,并通过ELISA检测抗HMGB-1自身抗体。通过对细胞内白介素-1β和HMGB-1进行免疫染色研究了巨噬细胞的活化。 HMGB-1被截短的HMGB-1衍生的BoxA蛋白作为竞争性拮抗剂靶向,每隔一天腹膜内注射,持续5周。结果DNase II -// ×IFNRI -/ − 小鼠发展成对称性多关节炎,其滑膜组织中胞浆和细胞外HMGB-1表达异常强烈,与对照动物相反。在疾病形成之前和期间,在DNase II -/-×IFNRI -/-小鼠中发现HMGB-1和HMGB-1自身抗体的血清水平升高。全身性HMGB-1特异性阻断明显改善了临床疾病进程,并通过组织学评估证明了对关节破坏的保护作用。有益的效果。

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  • 来源
    《Arthritis & Rheumatism》 |2010年第10期|p.2963-2972|共10页
  • 作者单位

    Astrid Lindgren Children's Hospital, Karolinska Hospital, and Karolinska Institutet, Stockholm, Sweden;

    Kyoto University, Kyoto, Japan;

    Kyoto University, Kyoto, Japan;

    Feinstein Institute for Medical Research, North Shore–Long Island Jewish Health System, Manhasset, New York;

    Feinstein Institute for Medical Research, North Shore–Long Island Jewish Health System, Manhasset, New York;

    Astrid Lindgren Children's Hospital, Karolinska Hospital, and Karolinska Institutet, Stockholm, Sweden;

    San Raffaele Scientific Institute, Milan, Italy;

    |Astrid Lindgren Children's Hospital, Karolinska Hospital, and Karolinska Institutet, Stockholm, Sweden;

    Astrid Lindgren Children's Hospital, Karolinska Hospital, and Karolinska Institutet, Stockholm, Sweden;

    Astrid Lindgren Children's Hospital, Karolinska Hospital, and Karolinska Institutet, Stockholm, Sweden;

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